Combination tumbler lock



July 7, 1942. o. LALQNDE 2,289,129

COMBINATION TUMBLER LOCK Filed Dc. .2o. 1940 2 sheets-sheet 1 lNvENToR 05cm? 44o/vof ATTORNEY July 7, 1942. o. LALONDE 2,289,129

COMBINATION TUMBLER LOCK Filed Dec. 20, 1940 2 Sheets-Sheet 2 lNvENToR 05cm? Ala/vof ATTORNEY Patented `luly 7, 1942 UMTED STATES TENT 05H@ 20 Claims.

My invention relates to locks which may be opened either by a key or by a combination, and is capable of general use, such as upon house doors, lockers, lock boxes, or other equipment where the use of such locks is desirable.

The principal object of my invention is to provide an improved arrangement of key and combination operated devices affording a compact, efficient, relatively inexpensive and readily installed mechanism for opening a lock by a key or combination.

Another object of my invention is to provide an improved construction and arrangement of combination operated devices, upon key operated lock opening mechanism, which affords convenient as well as selective opening of the lock either by the key or the combination.

Another object of vmy invention is to provide a key or combination lock mechanism which en ables the use of a standard key operated lock simply by mounting the combination mechanism thereon and an interposing combination controlled connector therebetween.

Another object of my invention is to provide a lock opening mechanism employing standard key operated mechanism with combination mechanism m-ounted thereon in such manner that vthe lock may be key opened, by preventing rotation of its barrel, or dial opened by imparting rotation to the barrel.

The invention consists of` the construction, combination and arrangement of parts, as herein illustrated, described and claimed.

In the accompanying drawings, forming part hereof, is illustrated one form of embodiment of the invention, in which drawings similar Vreference characters designate corresponding parts, and in which:

Figure l is a longitudinal sectional View of the key and combination operated lock opening mechanism with parts thereof shown in position for opening the lock by the key;

Figures 2 to 5 are transverse, sectional views on the lines 2 2, to 5 5, respectively, of Figure l, looking in the direction indicated by the arrows;

Figure 6 is a View similar to Figure l, but showing parts of the key and combination operated lock opening mechanism in position for opening the lock by the combination;

Figure 7 is a detail exploded perspective View,

of a casing and a key for securing it to a standard key operated lock mechanism; l

Figure 8 is a detail exploded perspective View of spacer and tumbler rings forming part of the combination mechanism;

Figure 9 is a detail exploded perspective view of the key operated lock mechanism and a dial, connector, key and spring forming part of the combination mechanism; and,l

Figure l0 is a top plan View of the key or combinationl operated lock opening mechanism shown in Figures 1 and 6.

Referring to the drawings, EI indicates the key plug of a standard key operated lock opening mechanism which is of well known construction and operation and therefore need not be described in detail herein.

It might be pointed out, however, that the key plug I I, having the usual key opening I2, is journaled in a barrel I3 containing the usual tiunbler pins (not shown) positioned in openings in the barrel I3 and retained therein by small plugs I4 or the liker When a key of proper conguration is inserted in the opening I2, the tumbler pins are disconnected from the plug I I whereupon, by turning the key, the plug I I is likewise turned to open the lock'proper (not shown). For this purpose the plug II has connected therewith, as by a universal joint I5, a square shaft I6 which, in turn', is connected with the lock proper in any suitable manner.

The barrel I3 has formed thereon at the iront end thereof an annular head I'I from which extends longitudinally of the barrel and through the rear end thereof, adove-tail slot I8 machined in said barrel, in accordance with my invention, to receive a part of the combination operated lock opening vmechanism hereinafter described. Rotatably mounted on the barrel I 3 against the head I1 thereof is a dial ring I9 having an annular beveled portion 2 provided therearound with a scale including the usual graduated marks and numbers herein shown as comprising the series 0 to 9, inclusive.

The dial ring I9 is further provided with a knurled or roughened annular portion 2l for turning it and said ring has secured thereto in any suitable manner and projecting rearwardly therefrom an annular shouldered seat 22. Cut or otherwisesuitably formed in the seat 22 of dial ring I9 is a'recess 23 provided at one side thereof with a cam 24. Projecting rearwardly from the shouldered seat 22 of the dial ring I9 and secured thereto in `any suitable manner in spaced relation with the recess 23. is a tumbler engaging and rotating pin 25 for operating the rst of a series ofv tumbler rings hereinafter described. In accordance with my invention, the tumbler rings and the dial ring I9 are employed in conjunction with a connector 26, when the lock is opened by the combination instead of a key, and said connector is preferably constructed and arranged as follows.

Secured to or formed integrally with the connector 2S, is a front tenon 21 and a rear tenori 28 in spaced relation therewith. The connector 26 is positioned in the dove-tail slot I8 of barrel I3 through the open, rear end thereof, the tenons 21, 28 being fitted in said slot and said connector being adapted for sliding movement along the slot in opposite directions, as hereinafter described. The connector 26 is provided on the forward end thereof with a rounded nose 29 and a cam 30 and at the top 3I thereof with transversely extending ridges 32, 33, 34, and grooves 35, 36. therebetween.

Connector 26 is urged toward the dial ring I9 by a small coil spring 31 disposed between the tenons 21, 28. One end of this spring bears against the tenon 21 and the opposite end of said spring bears against or is secured to a stop key 38. This stop key 38 extends transversely of the dove-tail slot I`8 and for adjustment of the tension of spring 31, said key is secured in one of the other of pairs of slots 39, 39, and 4B, 49, formed in the barrel I3 at opposite sides of the slot I8. The key 38 may `be disposed through a coil of the spring 31 instead 0f abutting the end thereof.

Fitted on the barrel I3 and bearing against the shouldered seat 22 of dial ring I9 is a spacer ring 4I, provided with an annular shouldered seat 42. A slot or opening 43 is formed in spacer ring 4I enabling it to be moved into position past connector 26 which thus prevents rotation of said ring on barrel I3.

Positioned over the barrel I3 and fitted upon the seat 22 of spacer ring 4I is a tumbler ring 44 having an arch 45 formed in the inner periphery thereof. This arch 45 enables tumbler ring 44 to pass over connector 26 when said ring is placed in position over barrel I 3, and said arch has a further and primary function hereinafter set forth. Tumbler ring 44 is provided at the front side thereof with a wide lug 46 and at the rear side with a narrow lug 41. The wide lug 46 bears against the shouldered seat 22 of dial ring I9 and is in alignment with pin 25 so as to be engaged thereby to rotate the tumbler ring 44 when said dial ring is rotated.

Fitted upon the barrel I3 and bearing against tumbler ring 44 within the rearwardly projecting narrow lug 41 thereof is a spacer ring 43 provided at the rear side thereof with an annular shouldered seat 49. A slot or opening 59 is formed in spacer ring 48 thereby enabling it to be moved into position past connector 26 which thus holds said ring against rotation n barrel I3, as in the case of the spacer ring 4I.

Positioned over the barrel I3 and fitted upon the seat 49 of spacer ring 48 is a tumbler ring I having an arch 52 formed in the inner periphery thereof. This arch 52 enables tumbler ring 5I to pass over connector 26 when said ring is placed in position over barrel I3 and, as in the case of arch 45 of tumbler ring 44, the arch 52 has a further and primary function hereinafter set forth.

Tumbler ring 5Il is provided at the front side thereof with diametrically disposed lugs 53 and 54 aligned with lug 41 of tumbler ring 44 and bearing against the rear side of the latter. It will thus appear that when dial ring I9 is rotated and pin 2-5 is engaged with the wide lug 45 to rotate tumbler ring 44, the narrow lug 41 on said ring will engage one or the other of lugs 53, 54 on tumbler ring 5I so that the latter is also rotated. Tumbler ring 5I is provided at the rear side thereof with diametrically disposed lugs 55 and 53 for a purpose hereinafter described.

Fitted upon the barrel I3 and bearing against tumbler ring 5I within the rearwardly projecting lugs 55, 53 thereof is a spacer ring 51 provided at the rear side thereof with an annular shouldered seat 5S. A slot or opening 59 is formed in spacer ring 51, thereby enabling it to be moved into position past connector 2S which thus holds said ring against rotation, as in the case of spacer rings 4I and 48.

Positioned over barrel I3 and fitted upon the seat 58 of spacer ring 51 is a tumbler ring 60 having an arch 6I formed in the inner periphery thereof. This arch 6I enables tumbler ring 60 to pass over connector 23 when said ring is placed in position over barrel I3 and, as in the case of arches and 52 of tumbler rings 44 and 5I, the arch 6I has a further and primary function hereinafter set forth. Tumbler ring $0 is provided at the front side thereof with a lug 62 disposed in alignment with lugs and 55 of tumbler ring 5I and bearing against the rear side of the latter. It will thus appear that when tumbler ring 5I is rotated as above described, one or the other of lugs 55 and 56 will engage lug G2 of tumbler ring 63 and rotate the same.

The dial ring I9, the connector 2B, and the tumbler rings 44, 5I and 60, mounted on barrel I3 as before described, comprise combination mechanism by which plug III and shaft I6 may be operated to open the lock. This combination mechanism, and the key operated lock opening mechanism housed in barrel I3, are enclosed in a casing 63 fitted over the barrel I3, the connector 26, and the several described spacer and tumbler rings. Casing 63 is provided with an annular shouldered seat 54 for the dial ring I9, and said casing and the parts therein may be arranged in a suitable opening in the door, box, or other place of installation, the casing there being held stationary by any suitable means for this purpose, and the square shaft I6 being connected with the lock proper in the usual manner.

In order to hold the casing 53 and parts therein in proper relative positions and also, in accordance with my invention, to provide under certain circumstances for rotation of the barrel I3, the casing 3 is provided with an arcuate slot 65 in which is fitted a fiat stop key 55 of similar configuration. This key 35 has an inner, arcuate bearing portion 31 engaged in an annular groove 68 formed in the barrel I3. The key E6 is removably positioned in slot 65 and has an outer, arcuate portion E9 fiush with the casing 63.

The operation of the standard lock opening mechanism in the barrel I3 is effected by the key therefor which, for the lock opening operation, is inserted in the key opening I2 to release the tumblers (not shown) in barrel I3 from the plug II. Thereupon the key is turned in the proper direction to rotate plug Ii and square shaft I6 and thus open the lock proper (not shown) connected with said shaft. Under these conditions, the connector 26 is positioned as shown in Figure 1 of the drawings, from which it will be noted that the rear end portion of said connector is disposed in a slot 19 in the rear of the fixed non-rotatable casing 63 so as to prevent rotation of barrel I3. When the lock is opened,

the door or other closure upon which 1t is installed may be opened, whereupon the spring of the lock, upon closing of the door or other closure, returns the plug II and square shaft I6 to their original, inoperative positions.

Assuming now that it is desired to open the lock by the combination mechanism instead of the key, the dial ring I9 is rotated in properdirections to successively bring certain numbers of a predetermined combination thereof opposite a suitable mark (not shown) on the shouldered seat 64 of casing 63. Prior to such rotation of the dial ring,|9, and for operation of the lock by the key, the connector 26 has been moved by the dial ring to the inoperative position shown in Figure 1 of the drawings, so that tumbler ring 44 is free to rotate on spacer ring 4| over the top 3| of connector 25; tumbler ring 5I is free to rotate on spacer ring 48 through groove 35 of the connector 26, and tumbler ring 60 is free to rotate on spacer ring 5l through groove 35 of said connector.

With the form of embodiment of my invention illustrated in the accompanying drawings, and when the combination mechanism employed to open the lock, dial ring I9 is first turned counterclockwise to bring the iirst of a predetermined combination of numbers opposite the mark. This results in engagement of pin 25 (Figures 2 and 10) with the right-hand side of wide lug 46 of tumbler ring t4, and in counterclockwise rotation of said ring. The left-hand side of narrow lug 41 of tumbler ring 44 thereupon engages the right-hand side of lug 54 of tumbler ring 5|, which ring is thus rotated counter-clockwise to engage the left-hand side of its lug 55 with the right-hand side of the lug 62 of tumbler ring BU. The tumbler ring El! is thus rotated counterclockwise to bring its arch SI into alignment with connector 26.

Dial ring I9 is then turned clockwise to bring the second of the predetermined combination of numbers opposite the mark. This results in engagement of pin 25 with the left-hand side of wide lug 45 of tumbler ring 44, thus produc ing clockwise rotation of said ring and engagement of the right-hand. side of its narrow lug 41 with the left-hand side of lug 53 of tumbler ring 5| Clockwise movement is thus imparted to tumbler ring 5I, and its arch 52 is brought into alignment with the connector E6.

Dial ring I9 is again turned counter-clockwise to bring the third of the predetermined combination of numbers opposite the mark. This again results in engagement of pin 25 with the righthand side of the wide lug 45 of tumbler ring 44 which ring is thus rotated counter-clockwise so that its arch'45 is brought into alignment with the connector 25. The arches 5I, 52, 45, of tumbler rings B0, 5I, 44, now being aligned with the connector 203, dial ring I9 is turned clockwise until recess 23 thereof is aligned with said connector. l

Thereupon the spring 3l moves the connector 26 to the right, as viewed in Figures 1 and 6 ci the drawings, so that the rear end of the connector passes out 'of the slot 'I0 of casing 63, and the rounded nose 29 of said connector enters said recess. Dial ring I9 and barrel I3 are thus connected together through the medium of the connector 26, and plug II and barrel I3 are, of course, connected by the tumbler pins (not shown) in said barrel. It will thus appear that, under these conditions, by further clockwise Vrotation of dial ring I9, the barrel I3, plug II, and

square shaft I6 will be likewise rotated and thus open'the lock.

The door or other closure may now be opened, after which the dial I9 is released and the spring of the lock returns the parts of the lock opening mechanism to their original positions, wherein the connector 26 is disposed in alignment with the slot IU of casing 63. Thereupon the dial ring I9 is turned counter-clockwise causing the cam 24 thereof to engage the cam 30 of the connector 26 and move it to the left (Figures l and 10) through the arches 45, 52, 6I, of the tumbler rings and into the slot 'I of the stationary casing 63.

The barrel I3 is thus again locked against rotation, and through further counter-clockwise rotation of the dial ring I9, the pin 25 and lugs of the several tumbler rings co-operate to rotate them so that their arches 6I, 52, 45, are moved out of alignment with the connector 2E, thus unsetting the combination. Upon closing and locking of the door or other closure, in the usual manner, the same may be again unlocked and opened, either by the key or the combination, as previously described.

From the foregoing it will appear that the present invention provides a novel construction and arrangement of parts, efcient in operation and readily installed, particularly with a standard key operated lock opening mechanism, and while I have herein disclosed with more or less particularity one form of embodiment of my invention, it is to be expressly understood that the same is not limited to said form of embodiment or otherwise than by the terms of the appended claims.

Having thus fully described the invention, what is claimed as new and desired to be secured by United States Letters Patent is:

1. In a lock adapted to be operated either by a key or a combination and having tumbler type lock operating means including a barrel and a key operated lock opening plug therein normally connected therewith, the combination with the barrel, of a lock opening mechanism rotatably mounted on the barrel and comprising tumbler rings and a dial for setting and unsetting said rings, and a block movable' longitudinally in said barrel through said rings to connect the barrel with the dial upon setting of the tumbler rings whereby to rotate the barrel and the plug by the dial to open the lock.

' 2. In a lock adapted to be operated either by a key or a combination and having tumbler type lock operating means vincluding a barrel and a key operated lock opening plug therein normally connected therewith,` the combination with the barrel, of a fixed casing for the barrel, lock opening mechanism rotatably mounted on the barrel and comprising tumbler rings within the casing and a dial for setting, unsetting said rings, and a key-like Vblock movable longitudinally in said barrel, rings and casing for alternatively connecting the barrel with the dial and the casing upon setting and unsetting of the tumbler rings wherevby to rotate'the barrel and the plug by the dial to open the lock or rotate the plug only by the key to open said lock.

3. In a lock adapted to be operated either by a key or a combination 'and having tumbler type lock operating means including a key operated lock opening plug, the combination of a tumbler barrel housing the plug normallyY connected thereto and provided with arlongitudin'ally extending slot, lock opening mechanism rotatably mounted on the barrel and comprising tumbler rings and a dial for setting and unsetting said rings, and means arranged between the barrel and the tumbler rings and movable along said slot when the tumbler rings are set for connecting the barrel with the dial to rotate the barrel and the plug by said dial to open the lock.

4. In a lock adapted to be operated either by a key or a combination and having tumbler type lock operating means including a barrel and a key operated lock opening plug therein normally connected therewith, the combination with the barrel, of lock opening mechanism rotatably mounted on the barrel and comprising tumbler rings and a dial for setting and unsetting said rings, and a spring pressed longitudinally slidable connector element intermediate said barrel and tumbler rings to connect the barrel with the dia-l upon setting of the tumbler rings whereby to rotate the barrel and the plug by the dial and open the lock.

5. In a lock adapted to be operated either by a key or a combination and having tumbler type lock opening means including a key operated lock opening plug, the combination of a tumbler barrel housing the plug normally connected thereto and provided with a longitudinally extending slot, spacer rings mounted on the barrel and having openings aligned with the slot thereof, lock opening mechanism rotatably mounted on the barrel f and the spacer rings and comprising tumbler rings and a dial for setting and unsetting said tumbler rings, a connector mounted on the barrel in its longitudinally extending slot and the spacer ring openings, and means for moving the conl nector along said slot into engagement with the dial upon setting of the tumbler rings, whereby to rotate the barrel and the plug by the dial and open the lock.

6. In a lock adapted to be operated either by a key or a combination and having tumbler type lock operating means including a barrel and a key operated lock opening plug therein normally connected therewith, the combination with the barrel, of a plurality of tumbler rings rotatably mounted on the barrel, a dial for setting and unsetting the tumbler rings, and a connector movable longitudinally of the barrel when said rings are set whereby to engage the dial and enable rotation of the barrel and the plug by said dial 4:

to open the lock.

'7. In a lock adapted to be operated either by a key or a combination and having tumbler type lock operating means including a barrel and a key operated lock opening plug therein normally connected therewith, the combination with the barrel, of a plurality of tumbler rings rotatably mounted on the barrel and provided at predetermined points with arches faced toward said barrel, a dial for setting and unsetting the tumbler rings, and a connector movable longitudinally of the barrel through said arches when said rings are set whereby to engage the dial and enable rotation of the barrel and the plug by said dial to open the lock,

3. In a lock adapted to be operated either by a key or a combination and having tumbler type lock operating means including a barrel and a key operated lock opening plug therein normally connected therewith, the combination with the barrel, of a plurality of tumbler rings rotatably mounted on the barrel and provided at predetermined points with arches faced toward the barrel and interengageable ring setting and unsetting lugs, a dial for setting and unsetting the tumbler rings to move their arches into and out of alignment, and a connector movable longitudinally of the barrel through said arches when said rings are set and the arches are aligned, whereby to engage the dial and enable rotation of the barrel and the plug by said dial to open the lock.

9. In a lock adapted to be operated either by a key or a combination and having tumbler type lock operating means including a key operated lock opening plug, the combination of a tumbler barrel on the plug normally connected thereto and having an exteriorly disposed longitudinally extending slot, a plurality of tumbler rings rotatably mounted on the barrel and provided at predetermined points with arches faced toward said barrel, a dial for setting and unsetting the tumbler rings to align and disalign their arches relative to the slot in the barrel, and a connector in said slot movable therealong through said arches upon alignment thereof whereby to engage the dial and enable rotation of the barrel and the plug by said dial to open the lock.

10. In a lock adapted to be operated either by a key or a combination and having tumbler type lock operating means including a key operated lock opening plug, the combination of a tumbler barrel on the plug normally connected thereto and having an exteriorly disposed longitudinally extending slot, a plurality of tumbler rings rotatably mounted on the barrel and provided at predetermined points with arches faced toward said barrel and interengageable ring setting and unsetting lugs, a dial for setting and unsetting the tumbler rings to align and disalign their arches relative to the slot in the barrel, and a connector in said slot movable therealong through said arches upon alignment thereof whereby to engage the dial and enable rotation of the barrel and the plug by said dial to open the lock.

11. In a lock adapted to be operated either by a key or a combination and having tumbler type lock operated means including a key operated lock opening plug, the combination of a tumbler barrel on the plug normally connected thereto and having an exteriorly disposed longitudinally extending slot, a plurality of tumbler rings rotatably mounted on the barrel and provided at predetermined points with arches faced toward said barrel, a dial for setting and unsetting the tumbler rings to align and disalign their arches relative to the slot in the barrel, and a spring and cam controlled connector in said slot movable therealong through said arches upon alignment thereof whereby to engage the dial and enable rotation of the barrel and the plug by said dial to open the lock.

12. In a lock operating mechanism, the combination of a barrel provided longitudinally thereof with an exteriorly disposed slot, axially aligned tumbler rings and a dial for setting and unsetting them rotatably mounted on said barrel, and means in said slot movable therealong in opposite directions when the rings are set to thereby connect said dial with and disconnect the same from the barrel.

13. In a lock operating mechanism, the combination of a barrel provided longitudinally thereof with an exteriorly disposed slot, axially aligned tumbler rings and a dial for setting and unsetting them rotatably mounted on said barrel, said tumbler rings being provided at predetermined points with arches aligned and disaligned relative to the barrel slot when the rings are set and unset, and means in said slot movable therealong in opposite directions through said arches when the rings are set to thereby connect said dial with and disconnect the same from the barrel.

14. In a lock operating mechanism, the combination of a barrel provided longitudinally thereof with an eXteriorly disposed slot, axially aligned tumbler rings and a dial for setting and unsetting them rotatably mounted on said barrel, said tumbler rings being provided at predetermined points With interengageable ring setting and unsetting lugs and arches aligned and disaligned relative to the barrel slot when the rings are set and unset, and means in said slot movable therealong in opposite directions when the rings are set to thereby connect said dial with and disconnect the same from the barrel.

15. In a lock operating mechanism, the combination of a barrel provided longitudinally thereof With an exteriorly disposed slot, axially aligned tumbler rings and a dial for setting and unsetting them rotatably mounted on said barrel, and spring and dial controlled means in said slot movable therealong in opposite directions when the rings are set to thereby connect said dial with and disconnect the same from the barrel.

16. In a lock operating mechanism, the combination of a barrel provided longitudinally thereof with an exteriorly disposed slot, axially aligned tumbler rings and a dial for setting and unsetting them rotatably mounted on said barrel, means in said slot movable therealong in opposite directions when the rings are set to thereby connect said dial with and disconnect the same from the barrel, a spring for engaging said means With a recess in the dial, and cams on the dial and said means for disengaging the latter from said recess.

17. In a lock operating mechanism, the combination of a barrel provided longitudinally thereof with an exteriorly disposed slot, spacer rings mounted on the barrel and having openings aligned With the barrel slot, tumbler rings rotatably mounted on the spacer rings and having arches aligned and disaligned relative to the barrel slot when said tumbler rings are set and unset, a dial for setting and unsetting the tumbler rings, and a connector arranged in the barrel slot for connecting and disconnecting action relative to the dial through the openings and arches in the spacer and tumbler rings.

18. In a lock operating mechanism, the combination of a barrel provided longitudinally thereof with an exteriorly disposed slot, spacer rings mounted on the barrel and having openings aligned With the barrel slot, tumbler rings rotatably mounted on the spacer rings and having arches aligned and disaligned relative to the barrel slot when said tumbler rings are set and unset, the tumbler rings having interengageable ring setting and unsetting lugs, a dial for setting and unsetting the tumbler rings and having a pin to engage one of said lugs, and a connector arranged in the barrel slot for connecting and disconnecting action relative to the dial through the openings and arches in the spacer and tumbler rings.

19. In a lock operating mechanism, the combination of a barrel provided longitudinally thereof with an exteriorly disposed slot, spacer rings mounted on the barrel and having openings aligned vvith the barrel slot, tumbler rings rotatably mounted on the spacer rings and having arches aligned and disaligned relative to the barrel slot when said tumbler rings are set and unset, a dial for setting and unsetting the tumbler rings, and a connector arranged in the barrel slot for connecting and disconnecting action relative to the dial through the openings and arches in the spacer and tumbler rings, said connector having grooves in which the tumbler rings may rotate and ridges to pass in and out of the tumbler ring arches, a spring housed in the barrel slot and connector for engaging the latter with a recess in the dial when the tumbler rings are set, and cam means on the dial and the connector for disengaging the latter from said recess.

20. In a lock operating mechanism, the combination of a barrel provided longitudinally thereof With an exteriorly disposed dove-tail slot, spacer rings mounted on the barrel and having openings aligned with thebarrel slot, tumbler rings rotatably mounted on the spacer rings and having arches aligned and disaligned relative to the barrel slot when said tumbler rings are set and unset, a dial for setting and unsetting the tumbler rings, and a connector arranged in the barrel slot for connecting and disconnecting action relative to the dial through the openings and arches in the spacer and tumbler rings, the connector having spaced tenons tted in said barrel slot and said connector being provided With grooves in which the tumbler rings may rotate and ridges to pass in and out of the tumbler ring arches when they are aligned with the barrel slot, a spring housed in the barrel slot between the connector tenons for engaging the connector with a recess in the dial when the tumbler rings are set, and cam means on the connector and on the dial adjacent its recess for disengaging said connector therefrom.

OSCAR LALONDE. 

